Preparation of FeO/C Composite Material from Red Mud for the Degradation of Acid Orange 7.

This study presents a novel FeO/C composite material synthesized from red mud through a process of magnetic roasting and separation. The research explores the impact of FeO/C dosages, sodium persulfate (PS) concentrations, and initial solution pH on the chemical oxygen demand (COD) removal efficiency using Acid Orange 7 as a model pollutant. Optimal conditions were identified as 3 g/L FeO/C, 20 mM PS, and an initial pH of 2, achieving a 94.